84 lines
3.1 KiB
Markdown
84 lines
3.1 KiB
Markdown
# wxPython:让面板自毁
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> 原文：<https://www.blog.pythonlibrary.org/2012/06/26/wxpython-making-a-panel-self-destruct/>
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前几天我在 StackOverflow 上看到一个问题，是关于如何在一段时间后动态地销毁和创建面板。我告诉那个家伙，他可以用我的一篇博客[文章](https://www.blog.pythonlibrary.org/2012/05/05/wxpython-adding-and-removing-widgets-dynamically/)中的例子，我在那里销毁和创建了按钮，但是那个家伙就是不明白。所以我写了一个简单的例子，其中面板显示倒计时，然后自我销毁，并立即被另一个面板替换。
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这是让你享受观赏乐趣的代码:
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```py
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import wx
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########################################################################
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class PanelOne(wx.Panel):
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""""""
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#----------------------------------------------------------------------
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def __init__(self, parent):
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"""Constructor"""
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wx.Panel.__init__(self, parent)
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self.countdown = wx.StaticText(self, label="This panel will self-destruct in 10 seconds")
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########################################################################
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class PanelTwo(wx.Panel):
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""""""
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#----------------------------------------------------------------------
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def __init__(self, parent):
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"""Constructor"""
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wx.Panel.__init__(self, parent)
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txt = wx.StaticText(self, label="Panel Two")
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########################################################################
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class MainFrame(wx.Frame):
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""""""
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#----------------------------------------------------------------------
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def __init__(self):
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"""Constructor"""
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wx.Frame.__init__(self, None, title="Panel Smacker")
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self.panelOne = PanelOne(self)
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self.time2die = 10
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self.timer = wx.Timer(self)
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self.Bind(wx.EVT_TIMER, self.update, self.timer)
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self.timer.Start(1000)
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self.sizer = wx.BoxSizer(wx.VERTICAL)
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self.sizer.Add(self.panelOne, 1, wx.EXPAND)
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self.SetSizer(self.sizer)
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#----------------------------------------------------------------------
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def update(self, event):
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""""""
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if self.time2die < 0:
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self.panelOne.Destroy()
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self.panelTwo = PanelTwo(self)
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self.sizer.Add(self.panelTwo, 1, wx.EXPAND)
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self.Layout()
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self.timer.Stop()
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else:
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msg = "This panel will self-destruct in %s seconds" % self.time2die
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self.panelOne.countdown.SetLabel(msg)
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self.time2die -= 1
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if __name__ == "__main__":
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app = wx.App(False)
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frame = MainFrame()
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frame.Show()
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app.MainLoop()
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```
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当您运行这段代码时，您应该会看到类似这样的内容:
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[](https://www.blog.pythonlibrary.org/wp-content/uploads/2012/06/panel_smack1.png)
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它会倒计时 10 秒，然后你会看到这个:
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[](https://www.blog.pythonlibrary.org/wp-content/uploads/2012/06/panel_smack2.png)
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如果你想了解更多关于计时器的知识，我也写了一篇关于计时器的文章。尽情享受吧！ |